**We've added a list of apps with Comcast Xfinity Apple TV activation to the end of this post.** If you're an Apple TV user and a Comcast Xfinity subscriber, you've probably wondered why the steps to activate certain channels on the Apple TV don't work. It doesn't seem to be an issue with Apple's software. It appears that Comcast doesn't want certain channels like History, AETV, Lifetime, etc. available to Apple TV users. Comcast is actually dense enough to make this a difficult process without [...]